n+7+n+2n-12=90

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Solution for n+7+n+2n-12=90 equation: 



n+7+n+2n-12=90

We move all terms to the left:

n+7+n+2n-12-(90)=0

We add all the numbers together, and all the variables

4n-95=0

We move all terms containing n to the left, all other terms to the right

4n=95

n=95/4

n=23+3/4

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